Electric fuse.



E. L. OGLE. ELECTRIC FUSE. APPLICATION FILED APR. 2a; -I9I1.

Patented Aug. 27,1918h INVENTOR. fll. 0

A TTQRNEYS.

UNITED sTATns rirrnur cierren.

EIMER L. OGLE, 0F CHICAGOJ ILLINOIS, ASSIGNOE TO FEDERAL SIGN SYSTEM' (EL'EC TRIO), OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ELECTRIC FUSE.

Specification of Letters Patent.

Application filed April 9.3, 1917. Serial No. 1633311.

T0 all lwhom t may concern Be it known that I, ELMER L. OGLE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and form the end closures of the inner' and outer tubes or casings.

I accomplish the objects by the mechanism illustrated in the accompanying drawings, I

in which: I

Figure l is a longitudinal section of a device embodying my invention.

. Fig. 2 is an end view partly in section looking toward the left in Fig.l 1.

Fig. 3 is a sectional view on the line 3-3, Fig. l.

Fig. 4: is a sectional view on the linea-v4,

Fig. 1.

ig. 5 is a perspective of the end cover for one end of the device.

Fig. 6 is a perspective of the ferrule which goperates with the end cover shown in Fig.

Fig. 7 is a fragmentary side view partly in section showing the assembly of one yof the end caps, star washers and associated parts.

Similar numerals refer to similar parts throughout the views.

In the form chosen to explain the nature of the invention, the fusible element 1 is embedded in suitable filling material 2. This is inclosed within a tube 3 of paper or other insulating material. The tube and its contents are inclosed within a casing 4 which, at the left end (Fig. 1), is closed by an end cap 5 of any suitable construction. At the opposite end the casing L has a ferrule 6 which is shown in perspective in Fig. 6, and which embodies one of the elements of the invention. This ferrule may be secured to the casing in any suitable manner, for example, by indenting the metal into the casing as illustrated at 7, Fig. 1. This ferrule is open at the end so that the tube 3 can be slipped into yit when the device is being assembled, but has an inwardly extending flange 9 adapted to engage and overlie the edge 10 of the end cover 11, shown in perspective in Fig. 5. In the best form, flange 9 extends throughout one-half of the circuinference of the ferrnle and has opposite to it a notch or countersink 12 which accommodates the fusible element 1, which is led out around the end of the casing and terminates in an end piece 13. As well shown in Fig. 6, 'the metal of the errule is cut back or countersunk at that portion which is not occupied by the ilange 9. It is cut back about the thickness of the cover t'o form a seat for said cover and permit it to lie at right angles to the axis of the device. This results in the formation of the vshoulders 16, hereinafter mentioned. The

cover 11 is circular to fit the end oi the ferrule and has two shoulders 15v which abut the 16 or the ferrule and thus make a rThe cover has an integral lug 18 which extends down the side of the device over the endpiece -13 of the fuse. It .has an aperture 19 which registers with an haperture 2O in end picco 13 and these both register with an aperture 21 formed in the side ofthe ferrule; boss 22 is formed on the inside of the ferrule which sinks into the side of the casing #t and helps hold the' ferrule securely in position upon the casing. Boss 22 is internally threaded to take the screw 23. It will be evident that when the parts are assembled as shown in Fig. 1 and screw 23 is in place, not only will the fuse be put into goed electrical contact with. both the ferrule and the cover, but the cover will externalobjects and in addition, the appear-v ance of the device is improved. rlhe entire end area of the device, that is, the entire area of the cover part proper is plain and free from screws or other attaching devices.

New referring to another feature of constructionby which the device is im roved: The insulating tube 3, which usual y con- CII 'to @ses the fuse l.

Lion, muy Q5 2e pinnen el;- Ll e be reif sheifun fill 'lgel lne, uns the righ, end. el Fig. l., is sie;

l, consists el? u 'plete whirl; is el such sil/ie :is to sulmlnniillly elose fille end S the tube zn'nl reziin lghe filling nizileiiel in place within llie tube. lt has number oi' poinls 27 formed upon it and. 'diese are slnnp enough lao sink inte the materiel of he tube when the latter foreell down upon it. This-occurs when the end cup 2S clenched over the end of the tube. lt is slotted to pass the fusible elenienl; This encl cap is clenched or crimped. onto the end ef lfle tube und ei'ushes il; enough to force il, onto the point el the stur iiv'uslier. ln si'nall size fuses, Where the peper eon1- posing the inner tube is thin, difficulty has )een experienced in providing ineens whereby the encl cup muy be secured. 'lhe tube is not still eneilgn te relmin he cap und con* Sequently freqnenily les the cup beeoiine loosened. lWitli in); eei'istruetion, however the star Washer ioi'ins :in internal backing for the tube and prevents it frein yielelineg or Crushing when the elenehing pressure is applied lo the cap. In iny eonslzrue'ion, the star Washer not only forms the bucking; le resist pressure from the outside but7 when the parts are assembled under alle eoncliliens mentioned, the Washer itself, having' 'il points sunk into the materiel of 'the Itube, is rigidly held and hence forms L Closure lilr'i retaining the filler.

'l ie ster washer 26 at the opposite enel olf Jhe fleviee operates in the saine manner and so also does the eon'ipenien end een 30. This Washer and ei'ul Cep bowel" larger central oiiening's, as they 'i Qusstlie socket 8l. 4which suppoi'ls 'the adjacent enel of the fusible eleinen. 53' inl ai@ 'The heeel. of lhis screw enters i eounefsinl in me en@l cup und liolcls lie )ingil; will be seen than', l i e end elosin'e of belli the unil allie innei` ube. A single suliieienllo bolli obi'iuin eonlziet :nul in ille enl'l closure n 'l'lie end of llle inner lube, l-he smrm'zish- ,e lo bruce 'the mulel'lul when l 1e end cups are being clenched into linee unil the:y ulso contribute to holding the filling' nm'teriel in position.

'llie pulls simple in foi-ni und easy to manufacture und assemble, :incl when essernbled, produce both en inner end und un oul'er closure i'vliieli is sure und eli'eetive.

Having thus described iny invention7 what l. claim us new :incl desire lo seein-'e by Let-I e's paientj is: Il,

L An elec-trie fuse having u fusible element, e easing, :in end cup for the easing, means for eenneeling the fusible elei'nent to the pep, seid ineens including u metallic tube, into 'elle end ef which the end of the fusible element is inserted7 the tube being eollupserl und pressed. onto the fusible elenienl; te securely grip it, und means ier ii'eslening seid lube said enel. snp.

2, An eleerie fuse hauling a fusible elenienz, (5in-lng en enil een for lhe easing, :L metallic mbe. one endl elf wliieh is lirnily jjness n i f l lle fusible eleineul' lo grip i1.. l the tube being' (fusing.

in. un f C Cil@ llnenclinl, leal @lenient marking; C0 'l L 'M else making 'i ann securing sami cup.,

in ele i milling easingy :in enel 1x, ineeilie unil is eoll l. element, the be u@ eylinfriezil ne ew passing; seien/nig ino said 

